Island County Wetlands
https://www.whidbeycd.org/uploads/1/1/6/8/11683986/wetlandtypes.pdf
City of Langley Tree Permitting
https://www.langleywa.org/departments/community_planning_and_building_department/tree.php
Green Belt Consulting
http://www.greenbeltconsulting.com/
Trees Are Good
http://www.treesaregood.com/
Why Hire An Arborist
http://www.treesaregood.com/treeowner/whyhireanarborist.aspx
Tree Owner’s Manual
https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5368392.pdf
Benefits of Arborist Mulch
https://puyallup.wsu.edu/wp-content/uploads/sites/403/2015/03/wood-chips.pdf
‘Windsail Reduction’ — a Northwest Controversy December 6, 2012
http://dnrtreelink.wordpress.com/2012/12/06/windsail-reduction-a-northwest-controversy/
A great video on roots and mycorrhizal relationships
http://vimeo.com/83697133
Tree Dictionary (with many good links)
http://www.treedictionary.com/